Project Billing-Advance Payment-Deferred Revenue

My project values is Rs500,000. So i've created an agreement & Fund it .

We need to bill the client for an advance payment. we cant recognise the revenue now.

i've created an Event with class 'Advance Payment-Deferred Revenue', Screenshot

then i've :
Run the process PRC:Generate Draft Invoice

Approve and release the invoice

Run the process PRC:Interface Invoice to Receivables
Run the process AutoInvoice Import Program in AR

Run the tieback process

we send the invoice to the customer. upon payment, we issued a receipt and applied it against that project invoice.

its at the moment of delivering goods that we must Recognise the Revenue of the advance payment. How can we do this?